Where: Oita, Japan (33.1° N, 131.3° E: paleocoordinates 44.3° N, 123.6° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Ryozen Formation (Onogawa Group), Turonian (93.9 - 89.8 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; conglomerate and sandstone

Size class: macrofossils

Preservation: cast, mold/impression

Primary reference: I. Hayami. 1975. A systematic survey of the Mesozoic Bivalvia from Japan. The University Museum, The University of Tokyo, Bulletin (10) [M. Aberhan/S. Nurnberg/S. Nurnberg]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40318: authorized by Martin Aberhan, entered by Sabine Nürnberg on 22.06.2004

Creative Commons license: CC BY (attribution)